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How many inch of mercury in 1 grams per square mm? The answer is 2.8959020848759. We assume you are converting between inch of mercury [0 °C] and gram-force/square millimetre. You can view more details on each measurement unit: inch of mercury or grams per square mm The SI derived unit for pressure is the pascal. 1 pascal is equal to 0.00029529983071445 inch of mercury, or 0.00010197162129779 grams per square mm. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between inches of mercury and grams-force/square millimeter. Type in your own numbers in the form to convert the units!
1 inch of mercury to grams per square mm = 0.34532 grams per square mm
5 inch of mercury to grams per square mm = 1.72658 grams per square mm
10 inch of mercury to grams per square mm = 3.45316 grams per square mm
20 inch of mercury to grams per square mm = 6.90631 grams per square mm
30 inch of mercury to grams per square mm = 10.35947 grams per square mm
40 inch of mercury to grams per square mm = 13.81262 grams per square mm
50 inch of mercury to grams per square mm = 17.26578 grams per square mm
75 inch of mercury to grams per square mm = 25.89867 grams per square mm
100 inch of mercury to grams per square mm = 34.53155 grams per square mm
You can do the reverse unit conversion from grams per square mm to inch of mercury, or enter any two units below:
Inches of mercury or inHg is a non-SI unit for pressure. It is still widely used for barometric pressure in weather reports and aviation in the United States, but is considered somewhat outdated elsewhere.
It is defined as the pressure exerted by a column of mercury of 1 inch in height at 32 °F (0 °C) at the standard acceleration of gravity.
1 inHg = 3,386.389 pascals at 0 °C.
Aircraft operating at higher altitudes (above 18,000 feet) set their barometric altimeters to a standard pressure of 29.92 inHg or 1,013.2 hPa (1 hPa = 1 mbar) regardless of the actual sea level pressure, with inches of mercury used in the U.S. and Canada. The resulting altimeter readings are known as flight levels.
Piston engine aircraft with constant-speed propellers also use inHg to measure manifold pressure, which is indicative of engine power produced.
ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 70 kg, 150 lbs, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!